All 866 fields should be updated to the new format. Updated 866 41 fields use commas to show gaps and semicolons to show changes in format (comma trumps semicolon). Depository HOLs do not use slashes at the end of the holdings statement. A reformatted 866 field uses indicators 41. If there are too many gaps to update an 866 field within reasonable time, use 866 31 and “(with gaps)”. Here are some examples with correct spacing:
v./no. format: v.2:no.4 (1974)-v.4:no.3 (1976), v.5:no.2-13 (1977), v.6 (1977)-v.13 (1985)
Volume spanning more than one year: v.15 (1986/1988)-v.17:no.3 (1989/1990), v.18 (1990/1991)
Months (used when v. lacks numbers): v.9 (1972)-v.10 (1973:Mar)
Currently received (use dash at end): v.14:no.6 (1977)-v.17 (1980)-
Page numbers: v.25 443-577 1947
Years: 1940, 1942-1944
Dates: 1960:Apr 25-1996:Oct 10
Volume crosses two years: v.1 (1967/1968)-v.3:no.3 (1969/1970), v.3:no.5 (1969/1970)-v.5 (1971/1972)
Change in format: 1940, 1942-1944; 1945/1946-1977; new ser.:v.1 (1978)-v.6 (1979), v.8-v.9 (1981), v.11 (1982)-v.30 (1999)
Change in format without interruption: v.4-v.5; v.6 (1977)-v.8 (1979)
Change in format with incompletes: v.1 (1962)-v.18 (1963); new ser.:v.1 (1964)-v.9:no.2 (1972), v.9:no.4-5 (1972), v.10:no.1 (1973), v.11:no.2-6 (1973), v.12:no.4 (1975)-v.14:no.4 (1977), v.14:no.6 (1977)-v.17 (1980)
Incompletes difficult to determine or too numerous to list: v.1-v.145 (with gaps)
Multiple levels: ser.3:v.2 (1957)-v.6:no.3 (1958), v.7 (1960)-v.8:no.3 (1961)
Ordinal numbers: 37th (1960)-38th (1961)
Editions: 1st ed.-4th ed.
Annual meetings etc.: 2nd-3rd